I found one of my hens acting very odd this morning. She is stretching out her neck and opening her mouth and making a very odd noise. She is in an enclosure that includes 2 houses and a large yard area. I have 22 in all and non of the others are acting different. I have her in the house now, she will not drink on her own. I have been giving her a few drops of water on her beak every few minutes. She will swallow when I do that but will not drink on her own. Please help.